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In the 4.8 document, PieChart inherits from QDeclarativeItem, and there is QGraphicsItem::ItemHasNoContents in PieChart's constructor. Now PieChart inherits from QQuickPaintedItem, and this code no longer exists.
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Dec 8, 2023
Using std::binary_search has the requirement that the passed
range fulfils ordering requirements, which was not the case
for the cppKeywords array here.
As the QString doc says [1]:
> QStrings can be compared using overloaded operators such as operator<(),
> operator<=(), operator==(), operator>=(), and so on. Note that
> the comparison is based exclusively on the numeric Unicode
> values of the characters. It is very fast, but is not what a
> human would expect; (...)
Therefore, sort the array accordingly and add an assert to
ensure it will remain sorted.
Fixes an crash/assert when building qtdeclarative with
CXXFLAGS='-D_GLIBCXX_DEBUG':
/usr/include/c++/13/bits/stl_algo.h:2243:
In function:
bool std::binary_search(_FIter, _FIter, const _Tp&) [with _FIter = const
QString*; _Tp = QStringView]
Error: elements in iterator range [first, last) are not partitioned by the
value __val.
Objects involved in the operation:
iterator "first" @ 0x7ffc4a2c4f18 {
type = QString const* (constant iterator);
}
iterator "last" @ 0x7ffc4a2c4f10 {
type = QString const* (constant iterator);
}
Aborted (core dumped)
ninja: build stopped: subcommand failed.
GDB backtrace:
Program terminated with signal SIGABRT, Aborted.
#0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44
44 ./nptl/pthread_kill.c: No such file or directory.
(gdb) bt
#0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44
#1 0x00007f307e0a815f in __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#2 0x00007f307e05a472 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3 0x00007f307e0444b2 in __GI_abort () at ./stdlib/abort.c:79
#4 0x00007f307e2a300d in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#5 0x00005639ff90471d in std::binary_search<QString const*, QStringView> (__first=0x5639ffa1a9c0 <QmltcVisitor::checkForNamingCollisionsWithCpp(QDeferredSharedPointer<QQmlJSScope const> const&)::cppKeywords>,
__last=0x5639ffa1b2c0 <guard variable for QmltcVisitor::checkForNamingCollisionsWithCpp(QDeferredSharedPointer<QQmlJSScope const> const&)::cppKeywords>, __val=...) at /usr/include/c++/13/bits/stl_algo.h:2243
#6 0x00005639ff8fb837 in operator() (__closure=0x7ffc4a2c52bf, word=...) at /home/michi/development/git/qt5/qtdeclarative/tools/qmltc/qmltcvisitor.cpp:764
#7 0x00005639ff8fb89e in operator() (__closure=0x7ffc4a2c52a0, name=..., errorPrefix=...) at /home/michi/development/git/qt5/qtdeclarative/tools/qmltc/qmltcvisitor.cpp:768
#8 0x00005639ff8fc99b in QmltcVisitor::checkForNamingCollisionsWithCpp (this=0x7ffc4a2c6070, type=...) at /home/michi/development/git/qt5/qtdeclarative/tools/qmltc/qmltcvisitor.cpp:787
#9 0x00005639ff8f9dea in QmltcVisitor::endVisit (this=0x7ffc4a2c6070, program=0x563a002e0628) at /home/michi/development/git/qt5/qtdeclarative/tools/qmltc/qmltcvisitor.cpp:341
#10 0x00007f307f6636fa in QQmlJS::AST::UiProgram::accept0 (this=0x563a002e0628, visitor=0x7ffc4a2c6070) at /home/michi/development/git/qt5/qtdeclarative/src/qml/parser/qqmljsast.cpp:1193
#11 0x00007f3080159b8f in QQmlJS::AST::Node::accept (this=0x563a002e0628, visitor=0x7ffc4a2c6070)
at /home/michi/development/git/qt5/qtbase/include/QtQml/6.7.0/QtQml/private/../../../../../../qtdeclarative/src/qml/parser/qqmljsast_p.h:272
#12 0x00007f3080212f4b in QQmlJSTypeResolver::init (this=0x7ffc4a2c5b50, visitor=0x7ffc4a2c6070, program=0x563a002e0628) at /home/michi/development/git/qt5/qtdeclarative/src/qmlcompiler/qqmljstyperesolver.cpp:173
#13 0x00005639ff8f0bd3 in QmltcTypeResolver::init (this=0x7ffc4a2c5b50, visitor=0x7ffc4a2c6070, program=0x563a002e0628) at /home/michi/development/git/qt5/qtdeclarative/tools/qmltc/qmltctyperesolver.cpp:19
#14 0x00005639ff8c02d4 in main (argc=23, argv=0x7ffc4a2c7a68) at /home/michi/development/git/qt5/qtdeclarative/tools/qmltc/main.cpp:269
[1] https://doc.qt.io/qt-6/qstring.html#comparing-strings
Change-Id: I82ebbcdca4ab90155b935f9af24b3a3821134563
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
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In the 4.8 document, PieChart inherits from QDeclarativeItem, and there is QGraphicsItem::ItemHasNoContents in PieChart's constructor. Now PieChart inherits from QQuickPaintedItem, and this code no longer exists.